Karl R. Popper: Objective Knowledge. An Evolutionary Approach

Human knowledge is perhaps the greatest miracle in our universe. In the past, the theory of human knowledge has been mainly subjectivist: even scientific knowledge was regarded as a special kind of human belief — a particularly well founded kind. The author breaks with this tradition: a realist and a fallibilist, he regards scientific knowledge, stated in human language, as no longer part of ourselves, but as exposed to objective criticism, which acts as a bridle and as a spur. Scientific knowledge grows through critical selection.
This is the fundamental thesis which the author argues closely and in simple language. The majority of the essays of which the book is composed have been published before, but some of them have been revised and expanded. They represent an approach to the problem of human knowledge which has had considerable influence on some recent thinkers.